本文選題：大型結(jié)構(gòu)物 + 液壓托舉　； 參考：《天津大學》2012年碩士論文

【摘要】：隨著改革開放發(fā)展,我國各項事業(yè)蓬勃騰飛,各種建筑物等大型結(jié)構(gòu)物朝著高、大、重方向發(fā)展的趨勢已是必然。由于種種原因,如異地建造,現(xiàn)場組裝,或城市規(guī)劃等工程項目要求,有些結(jié)構(gòu)物建好后需要進行移位,這就涉及到大型結(jié)構(gòu)物的移位技術(shù)。目前,根據(jù)結(jié)構(gòu)物的形式不同,移位方式也不同,主要有吊裝移位、滑動移位、小車移位以及本文中提及的滾軸移位等幾種不同的方式。吊裝方式重量有限,適用于中小型結(jié)構(gòu)物,滑動移位需要牽引機構(gòu)提供滿足結(jié)構(gòu)物滑行的較大牽引力,并且需要在滑道上進行,小車移位方式在國內(nèi)應用還十分有限。對于滾軸移位,國內(nèi)外應用此項技術(shù)實現(xiàn)大型建筑物的移位已經(jīng)很成熟,但液壓托舉滾軸移位技術(shù)研究還很少。因此,本文以大型結(jié)構(gòu)物液壓托舉滾軸移位技術(shù)為研究對象,主要研究內(nèi)容有: 1.應用赫茲接觸理論,分析了基于彈性滯后的滾軸滾動摩擦系數(shù)理論計算方法,得出了滾動摩擦系數(shù)的理論計算公式,并根據(jù)滾軸移位實驗測得的數(shù)據(jù)與理論計算數(shù)據(jù)進行對比分析; 2.應用有限元分析軟件ANSYS對滾軸、滾道進行接觸建模,對“荔灣3-1”30000t導管架滾軸移位過程中連續(xù)墊墩以及滾軸受力情況進行計算,分析了不同工況下的應力和變形; 3.對液壓托舉滾軸移位實現(xiàn)過程進行分析,利用PID控制技術(shù),對托舉過程中各頂升缸受力進行動態(tài)調(diào)節(jié),應用PLC對壓力、位移等測量信號進行判斷,通過上位機監(jiān)控,對電磁閥發(fā)出控制指令,實現(xiàn)滾軸移位時各托舉點頂升液壓缸受力均勻平穩(wěn)可控; 4.為驗證液壓托舉滾軸移位技術(shù)的優(yōu)越性與可行性,設(shè)計了集機、電、液壓一體化的滾軸移位實驗臺,通過對多工況、多配重箱情況下采集到的實驗數(shù)據(jù)進行分析,得出千斤頂/樁腿重量、位移變化曲線圖,并進行對比分析。 綜上,本文提出的大型結(jié)構(gòu)物液壓托舉滾軸移位技術(shù)有重要的工程實踐意義。
[Abstract]:With the development of reform and opening up, the development trend of large structures such as buildings is inevitable. For a variety of reasons, such as the construction of different places, site assembly, or urban planning and other engineering projects, some structures need to be displaced after construction, which involves the displacement technology of large structures. At present, according to the form of the structure, the displacement mode is different, including hoisting displacement, sliding displacement, trolley displacement and roller shift mentioned in this paper. The lifting mode is limited in weight and suitable for small and medium-sized structures. The sliding displacement requires the traction mechanism to provide a large traction to meet the structure glide, and it needs to be carried out on the slipway. The application of the small car shift mode in China is very limited. It is very mature to use this technology to realize the displacement of large buildings at home and abroad, but the research of hydraulic lift roller shift is still few. Therefore, this paper takes the displacement technology of hydraulic lifting roller of large structure as the research object, the main research contents are as follows: 1. Based on Hertz contact theory, the theoretical calculation method of rolling friction coefficient of roller shaft based on elastic lag is analyzed, and the theoretical formula of rolling friction coefficient is obtained. And according to the rolling axis shift experiment measured data and theoretical calculation data to carry on the contrast analysis; 2. The contact modeling of roller and raceway was carried out by using finite element analysis software ANSYS, and the stress of continuous cushion pier and rolling shaft during the shift of "Liwan 3-1" 30000t jacket was calculated, and the stress and deformation under different working conditions were analyzed. 3. This paper analyzes the realization process of hydraulic lifting roller shift, uses PID control technology to dynamically adjust the force of each lifting cylinder during the lifting process, uses PLC to judge the measuring signals such as pressure and displacement, and monitors by the upper computer. The solenoid valve is given the control instruction to realize the force uniform and controllable of the lifting hydraulic cylinder at each lifting point when the roller shift; 4. In order to verify the superiority and feasibility of the hydraulic lifting roller shift technology, a rolling shaft shift experimental platform with the integration of collector, electric and hydraulic is designed. The experimental data collected under the condition of multiple working conditions and multi-load boxes are analyzed. The curves of weight and displacement of Jack / pile leg are obtained and compared. In summary, the hydraulic lifting roller shift technology proposed in this paper has important engineering significance.
【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH133.2

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本文編號：1855507